168 MISC. PUBLICATION 273. U.S. DEPT. OF AGRICULTURE 



Figure 77. — Small redwood tree scored by galleries of the redwood bark 

 beetle (Phloeosinus sequoiae) and the roundheaded borer Semanotus ligneus 

 scquoiae. 



with reddish-brown wing covers and about 1 / s inch long. It attacks 

 the trunks of Sierra juniper in California, Oregon, and Washing- 

 ton, making a short egg tunnel with a large nuptial chamber at 

 the base. P. rugosus Sw. is a slightly smaller dark-brown species, 

 which attacks the larger limbs of Sierra juniper in California. 

 P. scopulorum Sw. breeds in Rocky Mountain juniper in British 

 Columbia and southward into Washington. P. utahensis Sw. and 

 P. aciculatus Bruck breed in junipers in Utah, Colorado, Arizona, 

 and New Mexico. 



The redwood bark beetle (Phloeosinus sequoiae Hopk.) (70) is 

 also y 8 inch long. It attacks weakened, felled, or fire-scorched red- 

 wood (fig. 77) along the coast of California and Oregon. P. squa- 

 mosus Blkm. is a similar species which attacks Port Orford cedar 

 and western redcedar along the coast from California to British 

 Columbia. P. nitidus Sw. attacks Alaska yellow-cedar in Wash- 

 ington. 



The sequoia bark beetle (Phloeosinus rubicundulus Sw.) works 

 in broken branches of giant sequoias in their native groves in 

 California. 



The cypress bark beetles, Phloeosinus cupressi Hopk. and P. 



